ES2771973T3 - Corrugated cardboard installation - Google Patents

Abstract

Corrugated cardboard installation for the manufacture of corrugated cardboard sheets (119), comprising a. a first material feeding device (5) for the delivery of a first material web (13), b. a second material feeding device (6) for the delivery of a second material web (18), c. a first corrugated cardboard production device (1) for generating a first corrugated cardboard strip (2) laminated at least on one side from at least the first material strip (13) and the second material strip (18), d . a cross-cutting device (115) for generating corrugated cardboard sheets (119) from at least the first corrugated cardboard strip (2) laminated on at least one side, e. a curvature detection device (122) for detecting a curvature of the corrugated cardboard sheets (119) and / or of corrugated cardboard partial strips (110) from at least the first corrugated cardboard strip (2) laminated at least by one face, - wherein the curvature detection device (122) comprises a first curvature detection device (123), which is arranged upstream of the cross-cut device (115), f. an information processing equipment (125), which receives from the curvature detection device (122) curvature information related to the corrugated cardboard sheets (119) and / or related to the corrugated cardboard partial bands (110), and g. at least one equipment to influence the curvature of corrugated cardboard sheets (20, 35, 44, 59, 69, 82, 90) to influence the curvature of the corrugated cardboard sheets (119), which can be operated depending on the signals received by the information processing equipment (125), characterized in that h. in the case of a detected change in the curvature of the partial strips of corrugated cardboard (110) in the first curvature detection equipment (123), the information processing equipment (125) immediately causes a change in the curvature of the sheets corrugated cardboard (119) by at least one of the equipment to influence the curvature of corrugated cardboard sheets (20, 35, 44, 59, 69, 82, 90), and i. The information processing equipment (125) stores a curvature trend from the first curvature detection equipment (123) towards a second curvature detection equipment (126), to shorten a regulation path towards the first curvature detection equipment curvature (123).

Description

DESCRIPTION

Corrugated cardboard installation

Reference is made in its entirety to the content of German patent application DE 102014202537.0. The invention relates to a corrugated cardboard installation for the manufacture of corrugated cardboard sheets according to the preamble of claim 1. Furthermore, the invention is directed to a process for the manufacture of corrugated cardboard sheets in a corrugated cardboard installation.

Corrugated cardboard plants for the manufacture of corrugated cardboard sheets are generally known from the prior art by public use. Corrugated cardboard sheets are produced from continuous corrugated cardboard strips or from corrugated cardboard partial strips which in turn originate from continuous corrugated cardboard strips. A very widespread problem in the manufacture of corrugated cardboard sheets is that the corrugated cardboard sheets after being generated bend or bow. This is generally due to a wrong setting of the corrugated board, defects in the corrugated board and / or lack of raw materials such as base paper. Such curved corrugated cardboard sheets cannot be reused in many cases.

From document US 2005/284579 A1 generic corrugated cardboard installations are known. Documents EP 1902 883 A1, EP 2 503 421 A1 and US 3,004,880 disclose other corrugated cardboard installations.

The invention is therefore based on the objective of creating a corrugated cardboard installation for the manufacture of corrugated cardboard sheets that overcomes the disadvantages indicated above. In particular, a corrugated cardboard installation must be provided for the manufacture of corrugated cardboard sheets that have a desired curvature (theoretical curvature) or are flat. Furthermore, deviations from the desired curvature or desired spread of corrugated cardboard sheets must be detectable as early as possible in their manufacture. A corresponding process for manufacturing corrugated cardboard sheets must also be devised.

This object is achieved according to the invention by the characteristics indicated in independent claims 1 and 15. The core of the invention resides in the fact that a curl detection device detects a curvature of corrugated cardboard sheets and / or of corrugated cardboard partial bands. The curvature of the corrugated cardboard sheets can be influenced, in particular by regulating the curvature of the corrugated cardboard sheets by at least one equipment for influencing the curvature of corrugated cardboard sheets depending on curvature information related to the corrugated cardboard sheets and / or partial corrugated cardboard strips, so that the corrugated cardboard sheets have a desired curvature or a desired course over their entire length and / or width.

The information processing equipment produces an extremely fast reaction time so that the number of defective corrugated cardboard sheets can be reduced to a minimum.

The first material feeding device is preferably designed as a splicing device. It is advantageous when the second material feed device is also designed as a connecting device.

Advantageously, the transverse cutting device comprises at least one knife-holder cylinder with at least one knife for transverse cutting of at least the first strip of corrugated cardboard laminated at least on one side. Preferably a continuous corrugated cardboard strip which is or comprises the first corrugated cardboard strip, is cut and divided into different partial strips of corrugated cardboard. It is advantageous when at least one cutter cylinder is associated with each corrugated cardboard part strip with at least one knife for the transverse cutting of the respective corrugated cardboard part. It is advantageous when a slitting and scoring equipment generates the corrugated cardboard part strips from at least the first and second strip of material.

The curvature detection device is capable in particular of detecting whether the corrugated cardboard sheets and / or the corrugated cardboard partial strips are curved or not curved along their entire length and / or width at least in areas.

Favorably the bend detection device works without contact. The curvature detection device detects, for example, the predominant distance in each case with respect to the respective or corrugated cardboard sheet or the respective partial strip of corrugated cardboard along its / its entire width and / or length. As an alternative the curvature detection device preferably detects the profile of the entire respective corrugated cardboard sheet or the entire respective partial corrugated cardboard web. The curvature detection device is particularly preferably designed as a laser distance detection device or as a line profile detection device.

It is convenient when the curl detecting device cannot move in at least one conveying direction of the corrugated cardboard web or corrugated cardboard sheets.

It is advantageous when the information processing equipment is electronic information processing equipment.

Preferably there are several equipment influencing the curvature of corrugated cardboard sheets. It is advantageous when the information processing equipment sends drive signals to at least one of the equipment influencing the curvature of corrugated cardboard sheets to influence the curvature of the corrugated cardboard sheets.

It is advantageous when at least one, preferably several, more preferably all equipment influencing the curvature of corrugated cardboard sheets in case of a necessary influence of the curvature of the corrugated cardboard sheets influencing the curvature of the corrugated cardboard sheets. corrugated cardboard in its transport direction and / or transversely to the transport direction.

The curvature of corrugated cardboard sheets can be influenced, for example, by unilateral modification of the humidity and / or temperature of at least one web of material or of at least one web of corrugated cardboard.

It is convenient when the information processing equipment and the at least one equipment for influencing the curvature of corrugated cardboard sheets are connected to each other by signals wirelessly or by cable.

Advantageously, the bend detecting device and the information processing equipment are connected to each other by signals wirelessly or by cable.

Other advantageous embodiments of the invention are indicated in the dependent claims.

It is advantageous when the first preheating equipment indicated in dependent claim 2 comprises a first preheating cylinder with which the first strip of zone material is in contact. The first strip of material is thus preheated from its side in contact with the first preheating cylinder at least in zones over its entire thickness. The preheating temperature of the first preheating cylinder is modifiable, which produces a change in the curvature of the corrugated cardboard sheets. An increase in this preheating temperature causes a downward curvature of the corrugated cardboard sheets, that is to say a downward warp.

By means of the glue application equipment indicated in dependent claim 3, the gluing of the first and / or second material web is modifiable, which produces a modification of the curvature of the corrugated cardboard sheets. In particular the amount of glue application is modifiable. Alternatively, the composition, in particular the humidity of the glue, is modifiable. It is advantageous when the glue application equipment comprises a glue application cylinder that applies glue on the side in contact with it of the respective material web. By regulating the glue application cylinder relative to this material web, for example, the amount of glue application on this material web can be easily changed, which in turn has an influence on the humidity present in this material web. . An increase in the humidity present in the second web of material causes an upward curvature of the corrugated cardboard sheets, that is to say an up warp.

The third material feeding device indicated in dependent claim 4 is preferably embodied as a splicing device.

It is advantageous when the fourth material feeding device is configured as a splicing device.

The first corrugated cardboard band and the second corrugated cardboard band can be joined, preferably glued to each other, preferably in layers. Preferably a further cover strip can be joined, preferably glued with a free corrugated strip of the first or second corrugated cardboard strip.

It is advantageous when the second preheating equipment indicated in dependent claim 5 comprises a second preheating cylinder with which the third strip of zone material is in contact. The third strip of material is preheated in this way from its side in contact with the second preheating cylinder at least in zones over its entire width. The preheating temperature of the second preheating cylinder is modifiable, which produces a change in the curvature of the corrugated cardboard sheets. An increase in this preheating temperature causes a downward curvature of the corrugated cardboard sheets, that is to say a downward warping.

By means of the glue application equipment indicated in dependent claim 6, the gluing of the third and / or fourth material web is modifiable, which produces a modification of the curvature of the corrugated cardboard sheets. In particular the amount of glue application is modifiable. Alternatively, the composition, in particular the humidity of the glue, is modifiable. It is advantageous when the glue application equipment comprises a glue application cylinder that applies glue to the side of the respective material web in contact with it. By regulating the glue application cylinder relative to this material web, for example, the amount of glue application on this material web can be easily changed, which in turn has an influence on the humidity present in the material web. . An increase in the humidity present in the fourth material web causes the corrugated cardboard sheets to bend upwards, that is to say an upward warp.

Preferably the preheating arrangement according to dependent claim 7 has a preheating cylinder associated with the first strip of material with which the first strip of corrugated cardboard is in contact by zones on the outside and thus from its adjacent side is preheated.

Advantageously, the preheating arrangement has an additional preheating cylinder associated with the second corrugated cardboard strip associated with which the second corrugated cardboard strip is in contact by zones on the outside and thus from its adjacent side is preheated.

It is convenient when the preheating arrangement comprises an additional preheating cylinder associated with a cover strip with which the cover strip is in contact in zones on the outside and thus from its adjacent side is preheated.

The preheating temperature of the preheating arrangement in the case of the first material strip, the second corrugated cardboard strip and / or the cover strip is modifiable, which produces a change in the curvature of the cardboard sheets curly. Preferably the preheating temperature of at least one, preferably all of the preheating cylinders of the preheating arrangement, can be modified, resulting in a modification of the curvature of the corrugated cardboard sheets. An increase in the preheating temperatures in the case of the first material web causes a downward curvature of the corrugated cardboard sheets, that is to say a downward warping. An increase in the preheating temperature in the case of the second corrugated cardboard strip causes a downward curvature of the corrugated cardboard sheets, ie a downward warping. An increase in the preheating temperature in the case of the cover strip causes an upward curvature of the corrugated cardboard sheets, ie an upward warping.

Preferably the gluing mechanism according to dependent claim 8 has a first gluing equipment associated with the first web of material for gluing the first web of material.

Advantageously, the gluing mechanism has a second gluing equipment associated with the second corrugated cardboard band towards the gluing equipment for gluing the second corrugated cardboard band.

The gluing of the first strip of material and / or second strip of corrugated cardboard is modifiable, which produces a modification of the curvature of the corrugated cardboard sheets. In particular the amount of glue application is modifiable. Alternatively, the composition, in particular the humidity of the glue, is modifiable. It is advantageous when the first gluing equipment comprises a first gluing cylinder which applies glue to the side in contact with it of the respective corrugated cardboard strip. Advantageously, the second gluing equipment has a second gluing cylinder which applies glue to the side in contact with it of the respective corrugated cardboard strip. By regulating the first and / or gluing cylinder relative to the corresponding corrugated cardboard strip, for example, the amount of glue application on this corrugated cardboard strip can easily be changed, which in turn has an influence on the humidity present. on the corrugated cardboard band. An increase in the humidity present in the first web of material causes the corrugated cardboard sheets to bend upwards, that is to say they warp upwards. An increase in humidity present in the second corrugated cardboard strip causes a downward curvature of the corrugated cardboard sheets, that is to say a downward warping.

It is advantageous when the heat pressure equipment according to dependent claim 9 comprises at least one heating element whose heating temperature can be modified. By means of the at least one heating element, the entire corrugated cardboard strip can be heated. A change in the heating temperature of the at least one heating element causes a change in the curvature of the corrugated cardboard sheets. The at least one heating element is arranged adjacent to the outer corrugated cardboard strip and / or the cover strip. It is preferably arranged only adjacent to the cover strip. An increase in the heating temperature in the cover strip causes an upward curvature of the corrugated cardboard sheets, ie an upward warping.

Preferably the heat press equipment has at least one pressure element which is designed in particular as a surrounding pressure belt and acts favorably by pressing against the first corrugated cardboard strip. By means of the at least one pressure element, preferably alternatively or in addition to the Modification of the heating temperature by means of the at least one heating element, the humidity in the first corrugated cardboard strip can be modified, so that the curvature of the corrugated cardboard sheets can thus also be influenced. An increase in humidity in the first material web by means of the at least one pressure element causes the corrugated cardboard sheets to bend upwards, that is to say they warp upwards. It is advantageous when by means of the at least one pressure element the first corrugated cardboard strip can be moistened with steam or liquid, preferably by spraying. It is expedient when in the at least one pressure element, at least one, preferably a large number of outlet openings / s is configured through which liquid or vapor can be conveyed to the first material web. In general, it is applied that a reverse operation of the equipment influencing the curvature of corrugated cardboard sheets compared to the indicated operation, as a reduction of the preheating temperature or of the prevailing humidity in the strip produces a curvature of the sheets of corrugated cardboard. Corresponding reverse corrugated cardboard.

The dimension of the curvature of the corrugated cardboard sheets can be influenced by the drive dimension of the equipment influencing the curvature of corrugated cardboard sheets.

By simultaneous actuation of several of the equipment influencing the curvature of corrugated cardboard sheets with influence of the same type on the curvature behavior of the corrugated cardboard sheets, the dimension of the curvature of the corrugated cardboard sheets can be increased.

When the corrugated cardboard sheets are curved downwards, that is to say when there is a downward warping then the edges of the corrugated cardboard sheets running transversely to the conveying direction of the corrugated cardboard band that are leading or trailing, they are in each case directed essentially downward or are arranged below a central region of the respective corrugated cardboard sheet which runs parallel between these edges.

When the corrugated cardboard sheets are curved upwards, that is to say when there is an upward warping, then the edges of the corrugated cardboard sheets that run transversely to the transport direction of the corrugated cardboard strip, which are leading or trailing , are in each case directed essentially upwards or are arranged above a central region of the respective corrugated cardboard sheet which runs parallel between these edges.

The curvature detection equipment indicated in dependent claim 10 and 11 may be identical or different in construction. They are preferably connected via signals in each case to the information processing equipment. The information processing equipment favorably receives curvature information related to the corrugated cardboard partial strips from the first curvature detection equipment. The information processing equipment favorably receives curvature information related to the corrugated cardboard sheets from the second curl detecting equipment.

The configuration according to dependent claim 13 produces extremely high corrugated sheet quality.

Dependent claims may also be preferred enhancements of independent claim 15.

A preferred embodiment of the invention is described below by way of example with reference to the accompanying drawing. In this respect they show:

FIG. 1 is a first part of a corrugated cardboard installation according to the invention, and FIG. 2 a second part of the corrugated cardboard installation according to the invention represented in FIG. 1.

A corrugated cardboard installation, as represented schematically in Figures 1 and 2, comprises a first corrugated cardboard production device 1 for the manufacture of a first continuous corrugated cardboard strip 2 laminated on one side, and a second production device of corrugated cardboard 3 for the manufacture of a second continuous corrugated cardboard strip 4 laminated on one side.

A first splicing device 5 and a second splicing device 6 are associated with the first corrugated cardboard production device 1, while a third splicing device 7 and a fourth splicing device 8 are associated with the second corrugated cardboard production device 3. .

The first splicing device 5 comprises for unwinding a first continuous material web from a first roll of material web 9 a first unwinding unit 10 and for unwinding a second continuous material web from a second roll of material web 11 a second unwinding unit 12. The The first and second web of continuous material are joined together to facilitate a first web of continuous material 13 by means of a not shown joining and cutting unit of the first splicing device 5. At each junction of the first and second web of continuous materials between a first joint seam is formed in the first continuous material web 13.

The second splicing device 6 is configured in accordance with the first splicing device 5. This has for unwinding a third continuous material web from a third roll of material web 14 a third unwinding unit 15 and for unwinding a fourth web of continuous material from a fourth roll of material web 16 a fourth unwind unit 17. The third and fourth web of continuous material are joined together to facilitate a second web of continuous material 18 by a joining and cutting unit not shown of the second splicing device 6. At each junction of the third and fourth material webs to each other, a second connecting seam is formed in the second continuous material web 18.

The first continuous strip of material 13 is preferably fed through at least one first deflection pulley 19 to a first preheating equipment 20 comprising a first heatable preheating cylinder 21. The first continuous material strip 13 is in zone contact on the outside with one face with the first preheating cylinder 21. The first pre-heated continuous strip of material 13 is then preferably fed through at least one second deflection pulley 22 of the first corrugated cardboard production device 1.

The second web of continuous material 18 is preferably fed through at least one third deflection pulley 23 of the first corrugated cardboard production device 1.

The third splicing device 7 is configured in accordance with the first splicing device 5. This comprises for unwinding a fifth continuous material web from a fifth roll of material web 24 a fifth unwinding unit 25 and for unwinding a sixth continuous material web from a sixth material web roll 26 to a sixth unwinding unit 27. The fifth and sixth continuous material web to facilitate a third continuous material web 28 are joined together by a joining and cutting unit not shown of the third splicing equipment 7. At each junction of the fifth and sixth material webs to each other in the third continuous material web 28, a third connecting seam is formed.

The fourth splicing device 8 is configured essentially in accordance with the second splicing device 6. This comprises for unwinding a seventh web of continuous material from a seventh roll of material web 29 a seventh unwinding unit 30 and for unwinding an eighth web of continuous material from an eighth roll of material web 31 an eighth unwind unit 32. The seventh and eighth web of continuous material are joined together to provide a fourth continuous web of material 33 by a joining and cutting unit not shown in the fourth splicing device 8. At each junction of the seventh and eighth material webs with each other, a fourth connecting seam is formed in the fourth material web 33 continuous.

The third continuous material band 28 is preferably fed through at least a fourth deflection pulley 34 to a second preheating equipment 35, comprising a second heatable preheating cylinder 36. The third continuous material band 28 with one face is in contact by zones on the outside with the second preheating cylinder 36 and is thus heated from this face. The third heated web 28 of continuous material is then preferably fed through at least one fifth deflection pulley 37 of the second corrugated board production device 3.

The first preheating equipment 20 and the second preheating equipment 35 can be warmed or heated independently of each other. The preheating temperature of its preheating cylinders 21, 36 is modifiable.

The fourth web of continuous material 33 is preferably fed through at least one sixth deflection pulley 38 to the second corrugated board production device 3.

The first corrugated cardboard production device 1 for generating a continuous corrugated web 39 exhibiting a corrugation from the second web of continuous material 18 comprises a first fluted cylinder 41 rotatably housed about a first axis of rotation 40 and a second grooved cylinder 43 housed in a rotary manner around the second axis of rotation 42. The grooved cylinders 41, 43 for the passage and groove of the second web of continuous material 18 configure a gap between cylinders, where the axes of rotation 40, 42 they run parallel to each other. The grooved cylinders 41,43 together form a first groove assembly.

For joining the first corrugated band 39 with the first continuous material band 13 to form a first corrugated cardboard band 2 laminated on one side, the first corrugated cardboard production device 1 has a first glue application equipment 44 which a in turn, it comprises a first glue dosing cylinder 45, a first glue container (not shown) and a first glue application cylinder 46. For the passage and gluing of the first corrugated band 39 the first glue application cylinder continues 46 with the first grooved cylinder 41 forms a glue gap, the first glue application cylinder 46 being arranged partially into or submerging into the first glue container. The glue from the glue container is applied over the ridges of the first wave band 39. The first glue dosing cylinder 45 abuts against the first glue application cylinder 46 and serves to form a layer of glue. uniform over the first glue application cylinder 46. The first glue application cylinder 46 can be adjusted relative to the first fluted cylinder 41, so that the glue gap present between them can be modified. A modification of the glue gap produces a modification of the quantity of glue transferred from the first glue container to the first corrugated band 39.

The first web of continuous material 13 is then joined with the first corrugated web 39 provided with glue in the first corrugated cardboard production device 1.

To press the first web of continuous material 13 against the first corrugated web 39 provided with glue, which in turn is in zone contact with the first fluted cylinder 41, the first corrugated cardboard production device 1 has a first module of corrugated cardboard. pressure 47. The first pressure band module 47 is disposed above the first knurled cylinder 41. It has a first pressure cylinder 49 rotatably housed about a third axis of rotation 48 and a second pressure cylinder 51 housed so rotatable around a fourth axis of rotation 50, as well as a continuous pressure band 52 which is guided around pressure cylinders 49, 51.

The first ribbed cylinder 41 is interconnected from below in a space between the pressure rollers 49, 51. The pressure band 52 is deflected in this respect by the first ribbed cylinder 41. It presses against the first material band continuous 13, which in turn is pressed against the first corrugated band 39 provided with glue, in contact with the first fluted cylinder 41.

For the temporary storage and damping of the first corrugated cardboard strip 2 laminated on one side, it is fed to a first storage equipment 53, where it has loops.

The second corrugated cardboard production device 3 is configured identical to the first corrugated cardboard production device 1. The second corrugated cardboard production device 3 comprises to generate a second continuous corrugated band 54 exhibiting a corrugation from the fourth band of material 33 continues a third grooved cylinder 56 housed rotatably about a fifth axis of rotation 55 and a fourth grooved cylinder 58 housed in a rotary manner about a sixth axis of rotation 57. The third grooved cylinder 56 and the fourth grooved cylinder 58 for the passage and grooving of the fourth continuous strip of material 33 configure a gap between cylinders, the fifth axis of rotation 55 and the sixth axis of rotation 57 running parallel to each other. The third fluted cylinder 56 and the fourth fluted cylinder 58 together form a flute assembly.

For joining the second continuous corrugated band 54 with the third continuous material band 28 to form the second corrugated cardboard band 4 laminated on one side, the second corrugated cardboard production device 3 has a second glue application equipment 59 which in turn comprises a second glue dosing cylinder 60, a second glue container (not shown) and a second glue application cylinder 61. For the passage and gluing of the second continuous corrugated strip 54 the second application cylinder Glue 61 with the third fluted cylinder 56 forms a glue gap, the second glue application cylinder 61 being arranged partially inside the second glue container or submerging therein. The glue from the second glue container is applied over the ridges of the corrugation of the second corrugated band 54. The second glue dosing cylinder 60 abuts against the second glue application cylinder 61 and serves to form a layer of glue. uniformly over the second glue application cylinder 61. The second glue application cylinder 61 can be adjusted relative to the third fluted cylinder 56, so that the glue gap between them can be modified. A modification of the glue gap produces a modification of the quantity of glue transferred from the second glue container to the second corrugated band 54.

The third web of continuous material 28 is then joined with the second corrugated web 54 provided with glue from the second container of glue in the second corrugated cardboard production device 3.

In order to press the third web of continuous material 28 against the second corrugated web 54 provided with glue which in turn is in zone contact with the third fluted cylinder 56, the second corrugated cardboard production device 3 has a second module of corrugated cardboard. pressure 62. The second pressure band module 62 is disposed above the third knurled cylinder 56. It has a third pressure cylinder 64 rotatably housed about a seventh axis of rotation 63 and a fourth pressure cylinder 66 housed so rotatable around an eighth axis of rotation 65 as well as a second pressure band 67 which is guided around the third pressure cylinder 64 and the fourth pressure cylinder 66.

The third ribbed cylinder 56 is coupled from below in regions in a space between the third pressure cylinder 64 and the fourth pressure cylinder 66. The second pressure band 67 is diverted through the third ribbed cylinder 56. It presses against the third web of continuous material 28, which in turn is pressed against the second corrugated web 54 provided with glue in contact with the third fluted cylinder 56.

For the temporary storage and damping of the second corrugated cardboard strip 4 laminated on one side, it is fed to a second storage equipment 68 where it has loops.

Downstream of the storage equipment 53, 68 there is a preheating arrangement 69 comprising a third, fourth and fifth preheating equipment 70, 71 or 72. The third, fourth and fifth preheating equipment 70, 71 or 72 are placed one on top of the other. The fourth preheating equipment 71 is arranged between the preheating equipment 70, 72.

The third preheating equipment 70 has a third heatable preheating cylinder 73, while the fourth preheating equipment 71 has a fourth heatable preheating cylinder 74. The fifth preheating equipment 72 has a fifth heatable preheating cylinder 75. The heating cylinders preheat 73, 74, 75 can be tempered or heated independently of each other. The preheating temperature of the preheating cylinders 73, 74, 75 is therefore modifiable.

The first corrugated cardboard band 2 is fed to the third preheating equipment 70 and is in zone contact with a face on the third preheating cylinder 73. The second corrugated cardboard band 4 is fed to the fourth preheating equipment 71 and is in Zonal contact with a face in the fourth preheating cylinder 74. A continuous cover strip 76 is fed to the fifth preheating equipment 72 and is in zone contacting a face with the fifth preheating cylinder 75.

A fifth splicing device 77 comprises for unwinding a ninth web of continuous material from a ninth roll of web of material 78 a ninth unwinding unit 79 and for unwinding a tenth web of continuous material from a tenth roll of web of material 80 a tenth unwinding unit 81. The ninth web of material and tenth web of continuous material are joined together to facilitate the continuous cover web 76 by a joining and cutting unit not shown of the fifth splicing device 77. At each joint of the On the ninth and tenth strip of material continuous with each other, a joint seam is formed on the continuous cover strip 76.

Downstream of the preheating arrangement 69 is a gluing mechanism 82 comprising a first gluing equipment 83 and a second gluing equipment 84 and is shown in Figure 2. The first gluing equipment 83 has a first gluing cylinder 85 which is immersed in a first glue bath 86 and transfers glue from the first glue bath 86 to the first preheated corrugated cardboard strip 2. The first gluing cylinder 85 can be adjusted such that the amount of glue transferred or transferable to the first corrugated cardboard strip 2 can be modified.

The second gluing equipment 84 has a second gluing cylinder 87 which dips into a second bath of glue 88 and transfers glue from the second bath of glue 88 to the second pre-heated corrugated cardboard web 4. The second gluing cylinder 87 can be adjusted in such a way that the amount of glue transferred or that can be transferred to the second corrugated cardboard strip 4 can be modified. The first gluing cylinder 85 and the second gluing cylinder 87 can be adjusted independently of each other.

The cover strip 76 is guided in the gluing mechanism 82 through a seventh deflection pulley 89. The second gluing equipment 84 is arranged between the first gluing equipment 83 and the seventh deflection pulley 89.

Downstream of the gluing mechanism 82 is arranged a heat pressure equipment 90. The heat pressure equipment 90 comprises a table 91 extending horizontally with heating elements 92. The heating temperature of the heating elements 92 is modifiable. Above the table 91 the heat pressure equipment 90 has a continuous driven back pressure belt 94, diverted through cylinders 93. By means of the back pressure belt 94 the first corrugated cardboard strip 2 can be sprayed with steam. Between the counter-pressure belt 94 and the table 91, a pressure gap 95 is formed through which the first glued corrugated cardboard strip 2, the second glued corrugated cardboard strip 4 and the cover strip 76 are guided and pressed there. against each other. The heating elements 92 are arranged adjacent to the cover strip 76 while the back pressure tape 94 is arranged adjacent to the first corrugated cardboard strip 2. In the heat pressing equipment 90 a corrugated cardboard strip 96 of five continuous layers.

Downstream from the heat pressure equipment 90, the corrugated cardboard installation has a scoring and longitudinal cutting equipment 97. The scoring and longitudinal cutting equipment 97 comprises on the input side two scoring stations 98 arranged one behind the other. as well as two slitting stations 99 arranged one behind the other.

The scoring stations 98 each have scoring tools 100 arranged in pairs one above the other, between which the five-layer corrugated cardboard strip 96 is guided.

The slitting stations 99 each have rotationally driven blades 101 which can be coupled with the five-ply corrugated cardboard strip 96 for slit separation thereof. The blades 101 cooperate with face-to-face, rotationally driven brush cylinders, not shown when the blades 101 are immersed in the five-layer corrugated cardboard strip 96. By means of the slitting stations 99 the five-layer corrugated cardboard strip 96 Hitherto undivided can be divided into several continuous corrugated cardboard part strips 110 which are conveyed in a conveying direction 105 and initially lie side by side.

Downstream from the scoring and longitudinal cutting equipment 97 there is arranged a short transverse cutter 102. The short transverse cutter 102 has a housing 103 in which a cylinder 104 is housed about a rotational axis 106 running perpendicular to the conveying direction 105 of the corrugated cardboard strip 96. The housing 103 of the short cross-cutter 102 is designed such that the five-layer corrugated cardboard strip 96 can be conveyed under the rotationally driven cylinder 104 by means of the short transverse cutting device 102. In the cylinder 104 is arranged a radially outwardly extending blade 107 extending perpendicular to the conveying direction 105 over the entire width of the five-ply corrugated cardboard web 96.

Underneath the five-layer corrugated cardboard strip 96 in the casing 103 are arranged several support devices 108 perpendicular to the transport direction 105. Each support device 108 comprises a cutting support 109 also called anvil that is held in a piston rod of a hydraulic cylinder (not shown). The piston rod is movable in a housing of the hydraulic cylinder in the conveying direction 105. The housing of the hydraulic cylinder is clamped at its end opposite the piston rod in the housing 103 of the short cross-cutter 102. Each cutting support 109 can be moved by means of the corresponding hydraulic cylinder in a first and second position. In the first position, which is the cutting position, the cutting support 109 is located directly below the cylinder 104. The vertical distance of the cylinder 104 relative to the cutting support 109 is selected in this respect such that the blade 107 during the rotation of the cylinder 104 about the axis of rotation 106 does not at that time touch the cutting support 109. In the second position that is not the cutting position the hydraulic cylinder piston rod has been fully extended so that the support cutter 109 is located in the conveying direction 105 in front of the cylinder 104. The short transverse cutter 102 serves on the one hand for the safe removal of lifting and lowering, and on the other hand for carrying out changes of application or format. With the short transverse cutting device 102, in the case of a change in format, connecting cuts can be generated which run perpendicular or obliquely to the conveying direction 105 which connect the respective longitudinal cuts generated by the longitudinal cutting stations 99, so that the corrugated cardboard partial webs 110 preferably remain continuous.

Downstream of the short transverse cutting device 102 there is arranged a separation device 111 which for the delivery of the partial corrugated cardboard strips 110 comprises a feeding table 112 and for the evacuation of the partial corrugated cardboard strips 110 in three planes comprises an ejection table unit 113 with three feeding tables 114. For a better transfer of the corrugated cardboard part strips 110 from the feeding table 112 to the feeding tables 114 there are preferably several separating device elements which are arranged side by side transversely to the conveying direction 105 pivotally on the feed table 112 and can be pivoted relative to the feed tables 114 at corresponding angular positions. Another number of ejection table units 113 is possible as an alternative.

Downstream of the separating device 111, a transverse cutting device 115 is provided which has three partial transverse cutting units 116 arranged one above the other. Each partial crosscutting equipment 116 comprises two rotationally driven crosscutting cylinders 117, arranged in pairs one above the other, extending transversely to the conveying direction 105. Each crosscutting cylinder 117 has a cutting blade. radially outwardly extending cross-section 118 for complete cross-sectional separation of the partial corrugated cardboard strips 110 and consequently to generate corrugated cardboard sheets 119. The cross-cut blades 118 of each partial cross-cutter 116 cooperate for the cross-sectional separation of the corrugated cardboard part strips 110 and actuated accordingly.

Downstream of each partial cross-cutting unit 116, a conveyor belt 120 is arranged for feeding the cut corrugated cardboard sheets 119 to stacking devices 121. To each conveyor belt 120 a stacking device 121 is associated with this.

The corrugated cardboard installation further comprises a curl detection device 122 for detecting the curvature of the partial strips of corrugated cardboard 110 and of the corrugated cardboard sheets 119.

The curvature detection device 122 in turn has for this a first curvature detection device 123, which is arranged upstream of the transverse cutting device 115 and extends transversely to the conveying direction 105 over the entire width of the strips. corrugated cardboard parts 110. If you look more closely, this is arranged between the scoring and longitudinal cutting equipment 97 and the cutting device 115. If you look even more closely, it is arranged between the short cross-cut device 102 and the cross-cut device 115. If you look even more closely, the first bend detection device 123 is arranged between the cross-section device. short cross section 102 and the separating device 111. It is preferably immobile at least in the transport direction 105.

The first device for detecting curvature 123 is capable of detecting the curvature of the partial strips of corrugated cardboard 110. For this, it comprises, for example, a first sensor for detecting curvature that is arranged above or below the partial strips of cardboard. corrugated 110. As an alternative, two curvature detection sensors are present which are arranged facing each other. The corrugated cardboard part strips 110 then run between them in each case.

The first device for detecting curvature 123 is particularly capable of detecting the curvature of the partial strips of corrugated cardboard 110 in the transport direction 105 and / or transversely to that up and / or down with respect to a plane or its extension in a plane.

The first curvature detection equipment 123 is connected by signals via a first signal line 124 with an information processing equipment 125. Through the first signal line 124, information processing equipment 125 is fed information of curvature towards the individual corrugated cardboard part strips 110.

Furthermore, the bend detection device 122 has a second bend detection device 126 which is arranged downstream of the cross-cut device 115. If you look more closely, this is arranged between the cross-cut device 115 and the cutting devices. stacked 121.

The second curvature detection device 126 in turn has three second curvature detection units 127. In this regard, each conveyor belt 120 is associated with a curvature detection unit 127. Each curvature detection unit 127 can comprise a sensor curvature detection that is disposed above or below the respective conveyor 120 and preferably is stationary at least in its conveying direction. Alternatively each curl detecting unit 127 has two curl detecting sensors which are arranged above and below the respective conveyor 120 in pairs and detect the curvature of the corrugated cardboard sheets 119 carried thereon.

The curl detection units 127 are capable of detecting the curvature of the corrugated cardboard sheets 119 in their respective conveying directions and / or transversely thereto up and / or down with respect to a respective plane or its extension in a flat.

Each curvature detection unit 127 is connected by signals via a second signal line 128 with the information processing equipment 125. Through the second signal line 128, the information processing equipment 125 can be fed in each case Curvature information related to corrugated cardboard sheets 119.

The information processing equipment 125 is capable in particular of modifying or correcting theoretical values for the corrugated cardboard bands 2, 4, 96 or for the partial corrugated cardboard bands 110, in particular the preheating temperature of the first preheating cylinder 21 , the preheating temperature of the second preheating cylinder 36, the preheating temperature of the third preheating cylinder 73, the preheating temperature of the fourth preheating cylinder 74, the preheating temperature of the fifth preheating cylinder 75, the heating temperature of the heating elements 92, the steam supply through the back pressure belt 94, the glue gap in the case of the first corrugated cardboard production device 1 and / or the glue gap in the case of the second corrugated cardboard production device. corrugated cardboard 3.

To this end, the information processing equipment 125 is connected via signals via a third signal line 129 with the first preheating equipment 20 to modify the preheating temperature of its preheating cylinder 21, if necessary for the influence of the curvature of corrugated cardboard sheets 119.

The information processing equipment 125 is connected via signals via a fourth signal line 130 with the first glue application equipment 44 of the first corrugated cardboard production equipment 1 to regulate its glue application cylinder 46 if necessary and thereby modifying the glue application, in particular the glue application amount to influence the curvature of the corrugated cardboard sheets 119.

The information processing equipment 125 is connected via signals via a fifth signal line 131 with the second preheating equipment 35 in order to modify the preheating temperature of its preheating cylinder 36, if necessary for the influence of the curvature of the corrugated cardboard sheets 119. Information processing equipment 125 is connected by signals through a sixth line of signal 132 with the second glue application equipment 59 of the second corrugated cardboard production device 3 to adjust its glue application cylinder 61 if necessary and thus modify the glue application, in particular the amount of glue application to influence the curvature of corrugated cardboard sheets 119.

The information processing equipment 125 is connected by signals further through a seventh signal line 133 with the third preheating equipment 70, the fourth preheating equipment 71 and the fourth preheating equipment 72 to modify the preheating temperatures of their Preheating rollers 73, 74 or 75 independently of each other if necessary to influence the curvature of the corrugated cardboard sheets 119.

The information processing equipment 125 is connected via signals via an eighth signal line 134 with the first gluing equipment 83 and the second gluing equipment 84 to change the position of their gluing rollers 85 or 87 as necessary and thus gluing the first or second corrugated cardboard strip 2, 4 to influence the curvature of the corrugated cardboard sheets 119.

The information processing equipment 125 is connected by signals via a ninth signal line 135 with the heat pressure equipment 90 to modify, if necessary, the heating temperature of its heating elements 92 and / or the steam supply. through the back pressure tape 94 to influence the curvature of the corrugated cardboard sheets 119.

To influence the curvature of the corrugated cardboard sheets 119, at least one of the equipment influencing the curvature of corrugated cardboard sheets 20, 35, 44, 59, 69, 82, 90 is operated via the signal line 124, 128 to 135 respectively correspondingly.

The information processing equipment 125 stores a curvature of the corrugated cardboard partial bands 110 detected by the first curvature detection equipment 123 or information of curvature on these and also a curvature of the corrugated cardboard sheets 119 detected by the second equipment curvature detection device 126 or curvature information on these when the information processing equipment 125 detects a deviation of the curvature of the corrugated cardboard sheets 119 in the case of the second curvature detection equipment 126 of a theoretical curvature of the sheets corrugated cardboard 119.

The information processing equipment 125 in case of a change in the curvature of the partial strips of corrugated cardboard 110 in the first equipment for detecting curvature 123, by means of at least one of the equipment influencing the curvature of corrugated cardboard sheets 20, 35, 44, 59, 69, 82, 90 interrupts a regulation of the curvature of the corrugated cardboard sheets 119.

The information processing equipment 125 then compares in the second curl detecting equipment 126 the actual curvature of the corrugated cardboard sheets 119 with the theoretical curvature of the corrugated cardboard sheets 119. The information processing equipment 125 repeats this until that the actual curvature of the corrugated cardboard sheets 119 corresponds to the theoretical curvature of the corrugated cardboard sheets 119.

In the event of a detected change in the curvature of the partial corrugated cardboard strips 110 in the first curvature detection device 123, the information processing device 125 immediately causes a change in the curvature of the corrugated cardboard sheets 119 by at least one of the equipment influencing the curvature of corrugated cardboard sheets 20, 35, 44, 59, 69, 82, 90.

The information processing equipment 125 stores the curvature tendency of the first curvature detection equipment 123 towards the second curvature detection equipment 126 to shorten the regulation path to the first curvature detection equipment 123.

It is advantageous when the information processing equipment 125 comprises a programmable memory control 136 that controls the heating and preheating temperatures or the application of glue.

It is advantageous when the information processing equipment 125 comprises a user interface. The user interface allows an intervention in the regulation of the installation of corrugated cardboard or curvature of the corrugated cardboard sheets 119.

Claims (15)

1. Corrugated cardboard installation for the manufacture of corrugated cardboard sheets (119), comprising a. a first material feeding device (5) for the delivery of a first material web (13), b. a second material feeding device (6) for the delivery of a second material web (18), c. a first corrugated cardboard production device (1) for generating a first corrugated cardboard strip (2) laminated at least on one side from at least the first material strip (13) and the second material strip (18), d. a cross-cutting device (115) for generating corrugated cardboard sheets (119) from at least the first corrugated cardboard strip (2) laminated on at least one side, and. a curl detection device (122) for detecting a curvature of the corrugated cardboard sheets (119) and / or of partial corrugated cardboard strips (110) from at least the first corrugated cardboard strip (2) laminated at least by one side, - wherein the curvature detection device (122) comprises a first curvature detection device (123), which is arranged upstream of the cross-cutting device (115), F. an information processing equipment (125), which receives from the curvature detection device (122) curvature information related to the corrugated cardboard sheets (119) and / or related to the partial corrugated cardboard strips (110), and g. at least one equipment to influence the curvature of corrugated cardboard sheets (20, 35, 44, 59, 69, 82, 90) to influence the curvature of the corrugated cardboard sheets (119), which can be operated depending on the signals received by the information processing equipment (125), characterized by what h. in the case of a detected change in the curvature of the partial corrugated cardboard strips (110) in the first curvature detection equipment (123), the information processing equipment (125) immediately causes a change in the curvature of the sheets corrugated cardboard (119) by means of at least one of the equipment to influence the curvature of corrugated cardboard sheets (20, 35, 44, 59, 69, 82, 90), and i. The information processing equipment (125) stores a curvature trend from the first curvature detection equipment (123) towards a second curvature detection equipment (126), to shorten a regulation path towards the first curvature detection equipment curvature (123). Corrugated cardboard installation according to claim 1, characterized in that between the first material feeding device (5) and the first corrugated cardboard production device (1) a first device for influencing the curvature of sheets of corrugated cardboard (20), associated with the first material band (13), to influence the curvature of the corrugated cardboard sheets (119), where preferably the first equipment influences the curvature of corrugated cardboard sheets (20 ) is realized as the first preheating equipment to preheat the first material band (13) from one side and the information processing equipment (125) to influence the curvature of the corrugated cardboard sheets (119) modifies a preheating temperature of the first preheating equipment (20). Corrugated cardboard installation according to claims 1 or 2, characterized in that the first corrugated cardboard production device (1) comprises a second equipment for influencing the curvature of corrugated cardboard sheets (44), to influence the curvature of the corrugated cardboard sheets (119), associated with the first material band (13) and / or the second material band (18), where preferably the second equipment influencing the curvature of corrugated cardboard sheets (44 ) is realized as glue application equipment to apply glue on the first material band (13) and / or on the second material band (18) from one side and the information processing equipment (125), to influence the the curvature of the corrugated cardboard sheets (119) modifies a gluing of the first material strip (13) and / or the second material strip (18) by means of the glue application equipment (44). Corrugated cardboard installation according to one of the preceding claims, characterized by to. a third material feeding device (7) for the delivery of a third material web (28), b. a fourth material feeding device (8) for the delivery of a fourth material web (33), and c. a second corrugated cardboard production device (3) for generating a second corrugated cardboard strip (4) laminated at least on one side from at least the third material strip (28) and the fourth material strip (33). Corrugated cardboard plant according to claim 4, characterized in that between the third material feeding device (7) and the second corrugated cardboard production device (3) a third device is arranged to influence the curvature of sheets of Corrugated cardboard (35), associated with the third material band (28), to influence the curvature of the corrugated cardboard sheets (119), where preferably the third equipment of Influence on the curvature of corrugated cardboard sheets (35) is realized as a second preheating equipment to preheat the third material band (28) from one side and the information processing equipment (125), to influence the curvature of the corrugated cardboard sheets (119), modifies a preheating temperature of the second preheating equipment (35). Corrugated cardboard installation according to claims 4 or 5, characterized in that the second corrugated cardboard production device (3) comprises a fourth device for influencing the curvature of corrugated cardboard sheets (59) to influence the curvature of the corrugated cardboard sheets (119) associated with the third material band (28) and / or the fourth material band (33), where preferably the fourth equipment for influencing the curvature of corrugated cardboard sheets (59) is realized as glue application equipment to apply glue on the third material band (28) and / or on the fourth material band (33) from one side and the information processing equipment (125), to influence the curvature of the corrugated cardboard sheets (119), modifies a gluing of the third material band (28) and / or of the fourth material band (33) by means of the glue application equipment (59). Corrugated cardboard plant according to one of Claims 4 to 6, characterized by a preheating arrangement (69) for preheating at least the first corrugated cardboard strip (2) and the second corrugated cardboard strip (4) from one side in each case, wherein the preheating arrangement (69) forms a fifth equipment influencing the curvature of corrugated cardboard sheets to influence the curvature of corrugated cardboard sheets (119) and the information processing equipment (125 ), to influence the curvature of the corrugated cardboard sheets (119), modifies a preheating temperature of the preheating arrangement (69) in the case of the first corrugated cardboard strip (2) and / or in the case of the second corrugated cardboard band (4). Corrugated cardboard plant according to one of Claims 4 to 7, characterized by a gluing mechanism (82) for applying glue to the first corrugated cardboard strip (2) and the second corrugated cardboard strip (4) from one face in each case, wherein the gluing mechanism (82) forms a sixth equipment to influence the curvature of corrugated cardboard sheets to influence the curvature of the corrugated cardboard sheets (119) and the information processing equipment (125), to influence the curvature of the corrugated cardboard sheets (119), modifies a gluing of the first corrugated cardboard band (2) and / or of the second corrugated cardboard band (4) by means of the gluing mechanism (82). Corrugated cardboard installation according to one of Claims 4 to 8, characterized by a heat pressure device (90) for pressing the first corrugated cardboard strip (2), the second corrugated cardboard strip (4) and a strip of cover (76) against each other and to heat at least one of them from one side, wherein the heat pressure equipment (90) forms a seventh equipment to influence the curvature of corrugated cardboard sheets to influence the curvature of the corrugated cardboard sheets (119) and the information processing equipment (125), to influence the curvature of the corrugated cardboard sheets (119), modifies a heating temperature of the heat pressure equipment (90) and / or a supply of humidity by means of the heat pressure equipment (90) to at least one of the outer bands (2, 76). Corrugated cardboard plant according to one of the preceding claims, characterized in that the first curvature detection device (123) is arranged between the transverse cutting device (115) and a grooving and longitudinal cutting device (97) arranged water above the transverse cutting device (115) to generate the partial strips of corrugated cardboard (110). Corrugated cardboard installation according to one of the preceding claims, characterized in that the curvature detection device (122) comprises the second curvature detection device (126) which is arranged downstream of the cross-cut device (115) to detect the curvature of the corrugated cardboard sheets (119). Corrugated cardboard installation according to claim 11, characterized in that the information processing equipment (125) stores a curvature of the partial corrugated cardboard strips (110) detected by the first curvature detection equipment (123) and a curvature of the corrugated cardboard sheets (119) detected by the second curvature detection equipment (126), at least briefly, when the information processing equipment (125) detects a deviation of the curvature of the corrugated cardboard sheets ( 119), in the case of the second curvature detection equipment (126), with respect to a theoretical curvature of the corrugated cardboard sheets (119). Corrugated cardboard installation according to claims 11 or 12, characterized in that the information processing equipment (125), in the event of a change in the curvature of the partial corrugated cardboard strips (110) in the first detection equipment of curvature (123), by means of at least one of the equipment influencing the curvature of corrugated cardboard sheets (20, 35, 44, 59, 69, 82, 90) interrupts a regulation of the curvature of the corrugated cardboard sheets (119) and the information processing equipment (125) then compares in the second curvature detection equipment (126) the actual curvature of the corrugated cardboard sheets (119) with the theoretical curvature of the corrugated cardboard sheets (119 ), the information processing equipment (125) repeating this until the actual curvature of the corrugated cardboard sheets (119) corresponds to the curvature theory of corrugated cardboard sheets (119). Corrugated cardboard installation according to one of the preceding claims, characterized in that the information processing equipment (125) drives at least one of the equipment to influence the curvature of corrugated cardboard sheets (20, 35, 44, 59 , 69, 82, 90) such that the corrugated cardboard sheets (119) are each flat or have a desired curvature. 15. Procedure to manufacture corrugated cardboard sheets (119), comprising the steps: - delivering a first material web (13) from a first material feeding device (5), - delivering a second material web (18) from a second material feeding device (6), - generating a first corrugated cardboard strip (2) laminated on at least one side from at least the first material strip (13) and the second material strip (18) by means of a first corrugated cardboard production device (1), - generating corrugated cardboard sheets (119) from at least the first corrugated cardboard strip (2), laminated at least on one side, by means of a cross-cutting device (115), - detecting a curvature of the corrugated cardboard sheets (119) and / or of partial corrugated cardboard strips (110) from at least the first corrugated cardboard strip (2), laminated at least on one side, by means of a detection device curvature (122), - wherein the curvature detection device (122) comprises a first curvature detection device (123) that is arranged upstream of the cross-cut device (115), - transmitting curvature information related to the corrugated cardboard sheets (119) and / or the corrugated cardboard partial bands (110) from the curvature detection device (122) to an information processing equipment (125), and - influence the curvature of the corrugated cardboard sheets (119) depending on signals received by the information processing equipment (125) by at least one equipment influencing the curvature of corrugated cardboard sheets (20, 35, 44, 59, 69, 82, 90) that can be actuated, - wherein in the case of a detected modification of the curvature of the partial strips of corrugated cardboard (110) in the first curvature detection equipment (123), the information processing equipment (125) immediately causes a modification of the curvature of the corrugated cardboard sheets (119) by at least one of the equipment influencing the curvature of corrugated cardboard sheets (20, 35, 44, 59, 69, 82, 90), - wherein the information processing equipment (125) stores a tendency to curvature from the first curvature detection equipment (123) towards a second curvature detection equipment (126), to shorten a regulation path towards the first equipment curvature detection (123).